rule "More than eighty characters" do
  pattern  /^.{80}.+$/
end

rule "Hard tabs (use soft tabs)" do
  pattern  /\t/
end

rule "Whitespace at end of line" do
  pattern /^.*\w+.*\s+$/
end

rule "Opening curly brace on its own line" do
  pattern /^\s*\{\s*$/
end
